🚀 go-pugleaf

HELP!!
I work with phonebooks. Up till now, I concentrated mainly on creating lists for the white and yellow pages and designing the ads. Now I need to step into actually flowing and putting all this together onto pages.
Previously, we used Quark 4 with xData to create the pages. We want to upgrade our Macs to System 10. We've purchased CS2 and would like to use it to do this.
I've figured out using DataMerge to create our proof sheets for the customers which works beautifully.
After a month of research, I'm pulling my hair out as to how or what to use to flow the data.
Our white pages come to us as either comma or tab delimited files. We use Office 2003 on a Windows machine to merge this with our data base to insert any ads or bolded listings. Same basic principal for the yellows. I've very confused as to what to use to accomplish this.
Is there anyone out there that does phonebooks that uses InDesign that can give me some pointers? I have a book due to go to press in a couple of weeks. All the data is ready, just how do I put it together? I could go back to Quark but really want to forge forward on this.
Thanks for any help. (I would prefer not to have to pay any more for plug-ins if possible.) Way over budget with the purchase of CS2.
Thanks, Dorothy